We need proper barriers to handle the power state change of the card
from different CPUs.
Reviewed-by: NJaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20210523090920.15345-2-tiwai@suse.deSigned-off-by: NTakashi Iwai <tiwai@suse.de>